427297700261 has 2 divisors, whose sum is σ = 427297700262. Its totient is φ = 427297700260.

The previous prime is 427297700243. The next prime is 427297700279. The reversal of 427297700261 is 162007792724.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (427297700243) and next prime (427297700279).

It can be written as a sum of positive squares in only one way, i.e., 243646883236 + 183650817025 = 493606^2 + 428545^2 .

It is a cyclic number.

It is not a de Polignac number, because 427297700261 - 2¹⁰ = 427297699237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427297700281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213648850130 + 213648850131.

It is an arithmetic number, because the mean of its divisors is an integer number (213648850131).

Almost surely, 2^427297700261 is an apocalyptic number.

It is an amenable number.

427297700261 is a deficient number, since it is larger than the sum of its proper divisors (1).

427297700261 is an equidigital number, since it uses as much as digits as its factorization.

427297700261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 592704, while the sum is 47.

The spelling of 427297700261 in words is "four hundred twenty-seven billion, two hundred ninety-seven million, seven hundred thousand, two hundred sixty-one".